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All Journal Berkala Ilmiah Pendidikan Fisika Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya
Adhelia Tasya Youlanda
Universitas Negeri Surabaya
Agriculture, Biological Sciences & Forestry Education Mathematics Physics Public Health Other

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Development and Validation of a Physics Test Instrument to Measure Problem-Solving Skills on Heat Concepts Adhelia Tasya Youlanda; Mukhayyarotin Niswati Rodliyatul Jauhariyah
Berkala Ilmiah Pendidikan Fisika Vol 14, No 2 (2026): JUNE 2026
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/bipf.v14i2.25819

Abstract

This study aims to develop a valid and reliable knowledge test instrument to measure students’ problem-solving skills in heat material. The research employed a research and development approach using the ADDIE development model. The instrument consisted of 10 essay questions constructed based on Polya’s problem-solving indicators. The instrument was validated by three experts, specifically two lecturers in the physics department and one physics teacher, and also tested on thirty-three first-year students enrolled in the Physics Education Study Program at Surabaya State University. The analysis included theoretical validity, empirical validity, reliability, difficulty level, and discrimination power. The results showed that the theoretical validity reached an average Percentage of Agreement (PoA) of 88.09% in the valid category. Empirical validity indicated that all items (100%) were valid with a reliability coefficient of 0.83, indicating high reliability. The difficulty level consisted of 60% easy and 40% moderate items, while the discrimination power showed 10% good and 90% sufficient categories. These findings indicate that the developed instrument is suitable for measuring students’ problem-solving skills in heat material and supporting the assessment of higher-order thinking skills in physics learning.
Students' Problem-Solving Skills on Heat Concepts: A Rasch-Based Analysis Using Classroom Assessment Adhelia Tasya Youlanda; Mukhayyarotin Niswati Rodliyatul Jauhariyah
Lambda: Jurnal Ilmiah Pendidikan MIPA dan Aplikasinya Vol. 6 No. 2 (2026): Lambda
Publisher : Lembaga Bale Literasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/lambda.v6i2.3559

Abstract

This study aimed to analyze students’ problem-solving skill profiles on the topic of heat using a Classroom Assessment instrument. A quantitative descriptive method was applied to 107 eleventh-grade students at SMA Negeri 8 Surabaya. Data were collected through a problem-solving test, worksheet assessment, science process skills observation, attitude observation, and attitude questionnaire. Rasch Model analysis using Wright Map and Person Measure was employed. Results showed that in the cognitive domain, 5 students were categorized as high, 58 as medium, and 44 as low. In the science process domain, observations classified 34 students as high, 23 as medium, and 50 as low, while worksheet assessments showed 42 high, 42 medium, and 23 low. In the attitude domain, observations resulted in 22 high, 51 medium, and 34 low, whereas questionnaires showed 16 high, 82 medium, and 9 low. Overall, students’ problem-solving skills were predominantly in the moderate category across cognitive, skills, and attitude domains. These findings indicate that students generally performed well on basic tasks but still require support in higher-order thinking, complex reasoning, and advanced science process skills.
Co-Authors Mukhayyarotin Niswati Rodliyatul Jauhariyah